device -> nRF Cloud -> web app

[FZe]

Hi

I need help in understanding what the best practice is when retrieving messages from devices via nRF Cloud to my web APP.

• I expect the devices to transmit messages in average once per hour.
• I plan to have 1-10k devices.
• My App can make API calls and receive Web Hooks.
• When a device (nRF9160) transmits an MQTT message to nRF Cloud, I want it to forward it to my APP in real time.

I checked the API and found "ListMessages", should I call this constantly (several times per second 24/7) to get the real time feel?

Or is there a better way?

Do I have to pay for each "ListMessage" call?

Regards

[Charlie]

Hi Fze,

I checked the API and found "ListMessages", should I call this constantly (several times per second 24/7) to get the real time feel?

This is not necessary, once you subscript a specific MQTT topic, you would be able to receive the update once an MQTT client publishes it. You can refer to MQTT API | nRF Cloud Docs to get more information.

Do I have to pay for each "ListMessage" call?

 There are amount of free offers you can use, please contact our local sales team if you want to learn more.

I just share some examples that can help you quickly start your developments:

nRF9160: Simple MQTT

nRF9160: Cloud client

nRF9160: AWS IoT

Best regards,

Charlie

[Patrick Barnes]

FZe said:

When a device (nRF9160) transmits an MQTT message to nRF Cloud, I want it to forward it to my APP in real time.

I recommend you take a look at docs.nrfcloud.com/.../SetupMessageBridge.

[FZe]

Thanks Patrick & Charlie, I'll have a look